AC Electrodeposition of Amorphous CoP Nanowires Embedded in an Alumina Template
Abstract:In this paper we report on the fabrication of amorphous CoP alloy nanowires by means of alternating current (ac) electrodeposition in an highly ordered anodic aluminum oxide (AAO) template. An ac voltage with sinusoidal waveform at a fixed frequency of 400 Hz was applied to electrodeposit nanowires from aqueous solutions with different phosphorous content at room temperature. Current transients demonstrate the general four-stage nucleation and growth behavior of nanowires in nanoporous templates and scanning electron microscopy confirms the formation of CoP nanowires in AAO. Results show that electrolyte phosphorous content influences the growth, microstructure and magnetic properties of the nanowires. An increase of phosphorus content reduces the growth rate of nanowires. The crystalline structure of cobalt nanowires electrodeposited in AAO changes significantly to amorphous by the incorporation of phosphorous as an alloying element in the structure, as X-ray diffraction patterns show. Furthermore, the coercivity of the CoP nanowires decreases when the electrolyte phosphorous content increases.
Document Type: Research Article
Publication date: 2012-04-01
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- Journal of Spintronics and Magnetic Nanomaterials is an international multidisciplinary peer-reviewed journal reporting new developments in the fields of magnetic and spintronics materials including their synthesis, characterization, properties, and applications in electronics, photonics, telecommunications, computer sciences, medicine, health science, etc. JSM is the first journal devoted to the exciting field of spintronics, which is playing a fundamental role in the novel technological developments based on the new spin torque transfer phenomena.
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